Accessories

900-1: Spray Assembly 

The water spray system is comprised of the Mounting Flange, Gasket, Close Nipple, Strainer, Nozzle and Solenoid Valve. The Solenoid Valve portion of the assembly partly relies upon differential water pressure across a diaphragm to open and close the valve. This flow of water takes place in small diameter orifices which should be kept free from debris as much as possible. Therefore, the Nozzle and Spray Assembly includes a strainer immediately upstream of the valve assembly. The minimum water pressure is 3,5 Bar/50 PSI and the maximum recommended water pressure is 6,9 Bar/100 PSI - achievement of which may require a pressure reducer.

Sensor: Water Flow Switch

The water flow switch can be employed at each nozzle of an extinguishment system to verify that water actually sprayed on a detection of a spark or ember. If water failed to flow on detection of a spark, a trouble condition will be initiated. The water flow switch can also be used during system testing to verify the flow of water when the spray is activated. 

Sensor: Heat Detector

A heat detector is available to monitor for excessive heat in ducts or in the dust collector. The heat detector provides a contact closure when the temperature exceeds the detectors rating. The system may be programmed to spray water or to active an auxiliary fire suppression system on detection of excessive heat. This may be utilized to dump water or steam into the dust collector or activate a pre-action sprinkler system.

Abort Dampers

Various sizes of Abort Dampers are available from Hansentek. These Abort Dampers may be used to abort air away from the dust collector or to abort return air away from the plant. These units are under control of the Spark Detection System.